05. Greeting by Name

#include <iostream>
using namespace std;

int main() {
    string name;
    cin >> name;

    cout << "Hello, " << name << '!' << endl;

    return 0;
}

ИЛИ:

#include <iostream>
using namespace std;

int main() {
    string name;
    cin >> name;

    printf("Hello, %s!\n", name.c_str());

    return 0;
}